Guides
Sume guides: the API, Formats, agents, models, media tools and pricing, each answer dated and sourced.
AI video generator for business: 5 things to check
An AI video generator for business needs commercial rights, team roles, company billing, spend limits and an API. What to check, and Sume's answers.
AI video generator for enterprise: terms, billing, limits
Buying an AI video generator for an enterprise means a signed order form, invoice or PO billing and higher limits. What Sume's Enterprise tier lists.
API uptime SLA: what it promises, and Sume's terms
An API uptime SLA promises a monthly availability percentage and credits if missed. Sume's terms offer none; how to build around that.
Is HeyGen free? What the Free plan includes
Yes, with limits: HeyGen's Free plan is $0 with no credit card, up to 3 videos a month, each up to 1 minute. Paid plans start at $29 a month.
Is Kling AI free? Free plan, credits and the API
Kling's app has a free Basic plan with no monthly credits, listed for personal non-commercial use. Paid plans add credits; the API is paid.
Is the Replicate API free? Free runs, credit and tokens
Only briefly: Replicate lets you run select models free, then asks you to set up billing and buy prepaid credit. The API token itself costs nothing.
Is fal.ai free? Credits, keys and what you pay for
fal's docs list no standing free tier: you buy prepaid credits and pay per output. A key costs nothing, and server errors are never billed.
HeyGen API key: get one and make your first video
Generate a HeyGen API key in its API dashboard, send it as X-Api-Key to api.heygen.com, check it with GET /v3/users/me, then create a video.
HeyGen API v2 retirement: the date and the v3 endpoints
HeyGen's API v1 and v2 stay operational until October 31, 2026 and retire on November 1. The warning headers, and the v3 call for each v2 call.
Replicate API rate limits: 600 creates a minute, then 429
Replicate's API allows 600 prediction creates and 3,000 other requests per minute. Low credit and no card tighten it; over the limit you get a 429.
fal.ai API rate limit: concurrency from 2 up to 40
fal.ai limits how many requests run at once, not requests per minute: 2 for a new account, rising with credit purchases to 40 self-serve.
Kling API rate limit: concurrency by package and error 1303
Kling's API limits concurrent tasks by resource package, not requests per second. Over the cap, a create fails with HTTP 429, code 1303.
Runway API rate limit: usage tiers, concurrency and 429s
Runway's API has no requests-per-minute limit. Usage tiers cap concurrency per model, generations per 24 hours and monthly spend.
HeyGen API avatar ID and voice ID: where to find them
In HeyGen's v3 API, avatar_id is a look id from GET /v3/avatars/looks, and voice_id comes from GET /v3/voices or the look's default voice.
fal AI FFmpeg API: endpoints, inputs and prices
fal hosts FFmpeg as model endpoints: merge videos, merge audio and video, extract a frame, compose tracks. Called with a fal key, priced per second.
How does the Higgsfield API work? Requests, limits, billing
Higgsfield's API is asynchronous: submit to a model endpoint, keep the request_id, poll or take a webhook, download. Billing and limits explained.
Recruitment video ideas you can make with AI, one per role
Recruitment video ideas that need no film crew: a short clip per open role, a why-work-here piece and a hiring-process explainer, made with an AI presenter.
Safety training videos for employees, made with AI
Make safety training videos for employees with an AI presenter: one hazard per clip, your own site photos, captions, and versions in your crew's languages.
Customer service training videos: role-plays made with AI
Customer service training videos as short AI role-plays: which scenarios to script, how to build a two-person scene, captions, and what each clip costs.
Dental marketing videos with AI: what to make, what to skip
Dental marketing videos AI can make without a patient: a meet-the-dentist clip, first-visit and FAQ answers, and office-photo tours. What to skip, and costs.
Law firm video marketing with an AI avatar of the attorney
Law firm video marketing with AI: short attorney intro and practice-area clips from an avatar of the lawyer, what not to generate, how it's made and billed.
Financial advisor video marketing with AI, compliance first
Financial advisor video marketing with AI: short explainers from an avatar, scripts approved before rendering, exact on-screen text, and per-second costs.
Roofing video ads with AI: make them from your job photos
Roofing video ads can be made with AI from your own job photos: animate a finished roof, add a voice-over and your phone number. What not to fake, and costs.
Fundraising video ideas for nonprofits, made with AI
Fundraising video ideas built on real material: one true story, a program update, the ask and the link. Where AI helps, where it must stop, and what it costs.
School promotional video with AI: show the real campus
A school promotional video should show the real campus and programs. Use AI for motion, voice and text on your own photos, not a generated campus. Steps, costs.
How to make a podcast trailer: length, script, AI voice
To make a podcast trailer, script an intro, highlights, a hook and a call to follow, keep it to two minutes or less, and mix the voice over a music bed.
Online course promo video with AI: what to put in it
An online course promo video says who it's for, what they'll learn, what's inside, who teaches it, and where to enroll. How to cut one from AI lessons.
Donor thank you video: one render, each donor's name
A donor thank you video can show each donor's name for the price of one render plus a caption job per name, or say each name aloud at a full render per donor.
AI wedding invitation video maker: art, motion, music, text
An AI wedding invitation video is your invitation art animated into short clips, set to music, with names, date and venue burned on as typed text.
AI Christmas video generator: a greeting that moves
An AI Christmas video is a few animated clips from a photo or a winter scene, an original instrumental, and your greeting burned on as typed text.
How to make AI cat videos: one cat, many shots
To make AI cat videos, approve one still of your cat, start every shot from it, and join the shots under narration. Dancing and talking cats, costs.
AI video generator for church: bumpers, announcements, loops
An AI video generator can make a church's sermon-series bumpers, weekly announcement clips and pre-service loops. How each is made, costs, limits.
AI recipe video generator: step photos, voice, quantities
An AI recipe video turns a photo of each step into a short clip, reads the method aloud, and burns quantities on as text. Steps, costs and limits.
AI fitness video maker: what to generate, what to film
An AI fitness video maker can make the coach, intro, B-roll and on-screen text, but not trustworthy exercise demos. What to film, what to generate.
AI meditation video generator: voice, calm loop, music bed
An AI guided meditation video is a slow narration over a calm visual loop and a soft music bed that dips under the voice. How to build one, and costs.
How to make an AI movie: shot by shot, then the cut
You make an AI movie shot by shot: clips of up to 30 seconds, generated from a shot list, checked, voiced, then cut together. Workflow, limits, costs.
AI movie trailer generator: shots, narration, music, titles
An AI movie trailer is short generated shots, a narrator, music that builds and burned-in title cards, cut together. How to make one, with costs.
AI whiteboard animation generator: blank board to sketch
AI can imitate whiteboard animation: a blank-board first frame, a finished-sketch last frame, the drawing in between. Words go on as captions.
AI product exploded view generator: two frames, real parts
An AI exploded view animation needs two stills: the product assembled and exploded. A video model makes the motion; the parts must come from you.
AI car video generator: from a car photo or a prompt
An AI car video generator animates a photo of your car or invents one from a prompt. How to get a driving shot, what drifts, and what it costs.
AI travel video generator: your trip photos or a prompt
An AI travel video generator either animates your own trip photos or invents a place from a prompt. How each works, what to label, and costs.
Seedance 2.0 API price: which is lowest, by resolution
The lowest-priced Seedance 2.0 API depends on resolution: at list prices for a 5-second clip, fal is lowest at 720p and Runway at 1080p. Dated table.
Kling 2.6 vs 3.0: length, resolution, audio and price
Kling 3.0 makes 3–15 s clips up to 4K with audio and multi-shot; 2.6 makes 5 or 10 s shots at 720p or 1080p. Kling's own specs and prices, dated.
1-minute AI video generator: two 30-second clips and a join
No single video request makes 60 seconds. Make two 30-second seedance-2.5 clips and join them with Timeline 1.0 at $0.10 per output minute. Costs and steps.
30-second AI video generator: which models make it in one request
Two models in Sume's catalog generate 30 seconds in one request: seedance-2.5 and wan-3.0. Other text-to-video models top out at 15. Cost at 480p to 1080p.
4:5 or 9:16 for video ads: what each platform's page lists
LinkedIn, Pinterest, TikTok and Meta list different vertical ratios for video ads. No Sume video model lists 4:5, so here is how to crop or size it.
AI avatar for a customer service kiosk: clips, not live chat
A kiosk that answers any question needs a live avatar. A kiosk with known answers can play rendered clips. What Sume's avatar video can and cannot do there.
AI avatar video aspect ratio: square, 3:4 and vertical 9:16
Sume's avatar video endpoint takes aspect_ratio 1:1, 3:4, 9:16, 4:3 or 16:9, defaulting to 9:16, at 720p. Which value to send for square or vertical.